Android Advertising

From my tests, Admob, Heyzap and Revmob are not working on android. Does anybody have a list of advertising extensions that currently work on Android? Ideally, I would be able to get a banner and an interstitial, but I would settle for just interstitials at this point.

Edit: FYI, I spent about 14 hours last week trying to get ad extensions working. I even contacted support from a couple of the agencies.